Happy Tree Friends encounter Friday the 13th and guess what? They have a bit of bad luck...

Happy Tree Friends (HTF) is an American flash cartoon created and developed by Aubrey Ankrum, Rhode Montijo, Kenn Navarro and Warren Graff for Mondo Media. The show is cited as an early example of a popular Internet phenomenon achieving a cult following.[1]

The action and adventure comedy is composed of simple drawings and juxtaposes cute forest animals with extreme graphic violence.[2] Each episode revolves around the characters enduring accidental events of bloodshed, pain, dismemberment, and/or death. At one point, the warning "Cartoon Violence: Not recommended for small children, or big babies" was given on the official website.[3]

The episodes last from 1 to 7 minutes. In 2006, a television series featuring longer episodes aired. A spin-off called Ka-Pow! premiered on September 2, 2008.